Due to Larger Diameter.You Must Use A Intake Manifold or Make Adjustments to Intake Manifold Throttle Body Flange to Match Bore and Keep IAC (Idle Air Control) Passage Separate.Complement your Series Throttle Body with a Intake Manifold for increased airflow.Will not fit on some D-series manifold with IAC opening less than 70mm. Must use Intake Manifold or similar.include features previously offered only in our line, like countersunk, stainless steel mounting bolts, solid brass throttle plates, fully machined bores, and idle adjustment screws for fine tuning.All throttle bodies undergo an extensive design and testing process to produce a throttle body that doesn't just provide more flow but retains smooth drivability and throttle characteristics.A larger throttle body is key to producing additional power throughout the powerband on modified engines with increased airflow demands.Series Throttle Bodies for B-series engines feature a large, 70mm bore, which results in significant horsepower gains throughout the powerband on heavily modified, naturally aspirated applications and even more on forced induction ones.A larger throttle body is very important to make additional power on modified engines with increased airflow demands.ZRs larger casting B throttle bodies can produce more horsepower gains on heavily modified and natrually aspirated applications and even more on forced induction ones for engines.fully machined bores, and idle adjustment screws for fine tuning.ZR has more than 10 years experience to design and manufacture the B throttle bodies that produce more air.With Additional Gasket and Installing Bolts.PART #309-05-1050Application:MANUAL TRANSMISSION ONLY:for B17A1for B18A1, B1, C1, C5for B16A2, A3for Honda B20B, Zfor D15B7, B8, Z1for D16Y7, Y8, Z6for F20C1for F22C1Not compatible with engines featuring down-flow intake manifolds,B18C GS-R intake manifold,'88-'91 D-series intake manifolds.Must use Intake Manifold or similar.for 1990 - 2001 (GS, )for 1992 - 2001 (GS-R) Require to use Pro Manifoldfor 1997 - 2001 ()for 1990 - 1999 ()for 1993 - 2000 Coupe (DX, EX) Require to use Pro Manifold for DXfor 1996 - 2000 Coupe ()for 1999 - 2000 Coupe (Si)for 1992 - 1995 Hatchback (, DX, Si, VX) Require to use Pro Manifoldfor 1992 - 2000 Sedan (DX, EX, LX) Require to use Pro Manifold for DX, LXfor 1998 - 2000 Sedan (GX) Require to use Pro Manifoldfor 1993 - 1997 del Sol (S, Si)for 1994 - 1997 del Sol (VTEC) for 2000 - 2004 S2000 F20C only (Base)colour:SilverMaterial:Stainless steel + aluminum alloy + coppersize:24*29*14cmBore Size is 70MMPackage Contents:1* throttle1* washer4* screwOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.
